.tree {
    min-height:20px;
    margin-bottom:20px;
    background-color:#fbfbfb;
}
.tree ul ul li{
    display: none;
}
.tree ul{
    margin: 0;
}
.tree li {
    list-style-type:none;
    margin:0;
    padding:10px 0 0 0;
    position:relative
}
.tree li::before, .tree li::after {
    content:'';
    left:-20px;
    position:absolute;
    right:auto
}
.tree li::before {
    border-left:1px solid #999;
    bottom:50px;
    height:100%;
    top:0;
    width:1px;
}
.tree li::after {
    border-top:1px solid #999;
    height:20px;
    top:25px;
    width:25px
}
.tree li>span {
    -moz-border-radius:5px;
    -webkit-border-radius:5px;
    border:1px solid #E0E0E0;
    width: 95%;
    border-radius:5px;
    display:inline-block;
    padding:3px 15px;
    text-decoration:none;
    background-color: #F1F1F1;
}
.tree li>span>span.title {
    padding-left: 10px;
}
.tree span.title{
    border: none !important;
}
.tree li.parent_li>span {
    cursor:pointer;
}
.tree>ul>li::before, .tree>ul>li::after {
    border:0
}
.tree li:last-child::before {
    height:30px
}
.tree li.parent_li>span:hover, .tree li.parent_li>span:hover+ul li span {
    background:#eee;
    border:1px solid #94a0b4;
    color:#000
}